with illness following a period

Question

She has been diagnosed with illness following a period of self-isolation and subsequent testing.

in this sentence is (following) means (after a period) or (coming a period) ?

Answer 1

Following means after. (You have only to google it!)

Note that we don't speak of being diagnosed with (an) illness. The whole point of diagnosis is to establish, not that somebody is ill, but what exactly illness they are suffering from.

https://www.merriam-webster.com/dictionary/diagnosis